BS ISO 10835:2007

Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 General considerations for sampling and
   sample preparation
   4.1 Basic requirements
   4.2 Establishing a sampling scheme
   4.3 System verification
5 Fundamentals of sampling and sample
   preparation
   5.1 Minimization of bias
        5.1.1 General
        5.1.2 Minimization of particle-size
               degradation
        5.1.3 Extraction of increments
        5.1.4 Increment mass
   5.2 Overall precision
   5.3 Quality variation
   5.4 Sampling precision and number of
        primary increments
        5.4.1 Mass-basis sampling
        5.4.2 Time-basis sampling
   5.5 Precision of sample preparation and
        overall precision
        5.5.1 General
        5.5.2 Preparation and measurement of
               gross sample
        5.5.3 Preparation and measurement of
               partial samples
        5.5.4 Preparation and measurement of
               each increment
6 Methods of sampling
   6.1 Mass-basis sampling
        6.1.1 Mass of increment
        6.1.2 Quality variation
        6.1.3 Number of primary increments
        6.1.4 Sampling interval
        6.1.5 Methods of taking increments
   6.2 Time-basis sampling
        6.2.1 Mass of increment
        6.2.2 Quality variation
        6.2.3 Number of increments
        6.2.4 Sampling interval
        6.2.5 Methods of taking increments
   6.3 Stratified random sampling within fixed
        mass or time intervals
        6.3.1 General
        6.3.2 Fixed mass intervals
        6.3.3 Fixed time intervals
7 Sampling from moving streams
   7.1 General
   7.2 Safety of operations
   7.3 Robustness of sampling installation
   7.4 Versatility of sampling system
   7.5 Primary samplers
        7.5.1 Location
        7.5.2 Types of primary sampler
        7.5.3 General design criteria for
               primary cutters
        7.5.4 Cutter aperture of primary sampler
        7.5.5 Cutter speed of primary sampler
   7.6 Secondary and subsequent samplers
   7.7 On-line sample preparation
        7.7.1 Arrangement for sample preparation
        7.7.2 Crushers
        7.7.3 Dividers
        7.7.4 Dryers
   7.8 Checking precision and bias
   7.9 Cleaning and maintenance
   7.10 Example of a flowsheet
8 Sampling from stationary situations
9 Stopped-belt reference sampling
10 Sample preparation
   10.1 Fundamentals
        10.1.1 General
        10.1.2 Crushing and grinding
        10.1.3 Mixing
        10.1.4 Sample division
        10.1.5 Mass of divided sample
        10.1.6 Split use and multiple use of sample
   10.2 Method of constituting partial samples
        or a gross sample
        10.2.1 General
        10.2.2 Method of constitution for
               mass-basis sampling
        10.2.3 Method of constitution for
               time-basis sampling
   10.3 Mechanical methods of division
        10.3.1 Mechanical increment division
        10.3.2 Other mechanical-division methods
   10.4 Manual methods of division
        10.4.1 Manual increment division
        10.4.2 Fractional shoveling
        10.4.3 Manual riffle division method
   10.5 Preparation of test sample for physical
        testing
   10.6 Preparation of test sample for moisture
        determination
   10.7 Preparation of test sample for chemical
        analysis
        10.7.1 Mass and particle size
        10.7.2 Preparation to -250 [mu]m
        10.7.3 Final preparation to -160 [mu]m
        10.7.4 Distribution of samples for chemical
               analysis
   10.8 Example of sample-preparation process
11 Packing and marking of sample
Annex A (informative) - Inspection of mechanical
                        sampling systems
Annex B (normative) - Equation for number of increments
Annex C (normative) - Riffle dividers

Provides the underlying theory, the basic principles for sampling and preparation of samples, and the basic requirements for the design, installation and operation of sampling systems, for mechanical sampling, manual sampling and preparation of samples taken from a lot under transfer, to determine the chemical composition, moisture content and physical properties of the lot.

This International Standard gives the underlying theory, the basic principles for sampling and preparation of samples, and the basic requirements for the design, installation and operation of sampling systems, for mechanical sampling, manual sampling and preparation of samples taken from a lot under transfer, to determine the chemical composition, moisture content and physical properties of the lot. The methods specified in this International Standard are applicable to both the loading and discharging of direct reduced iron (DRI) and hot briquetted iron (HBI), by means of belt conveyors and other ore handling equipment to which a mechanical sampler may be installed or where stopped-belt sampling may safely be conducted. In this International Standard, DRI includes both reduced pellets and reduced lump ores. CAUTION Direct reduced iron (DRI) and, in some cases, hot briquetted iron (HBI), for example, with low density or high fines content, may react with water and air to produce hydrogen and heat. The heat produced may cause ignition. Therefore, due consideration shall be given to the safety of operators by respecting applicable regulations or international codes.